marine plywood 2.5cm thick

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iainmillett

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I am looking for a small amount of marine plywood 2.5 cm thick and about 1ft square either in Kent or Suffolk - the latter where we keep our small Hunter. It is needed to be shaped to replace the outboard mounting.

Any ideas who might supply - indeed an alternative that would do. Don't want to lose the outboard (2.2HP) after years of good service.
 
Hi,
If you want Marine grade ply,
dont compromise. get the best.

WBP, in a pigs ear!

do it right, it will last.

kind regards,
Les.
 
[ QUOTE ]
Hi,
If you want Marine grade ply,
dont compromise. get the best.

WBP, in a pigs ear!

do it right, it will last.

kind regards,
Les.

[/ QUOTE ]

Oh dear .... so all Marine grade is good ? Sad fact that it is not.

Others who suggest WBP and protective coating are IMHO giving reasonable advice.

I always used Marine grade for years - till a timber merchant educated me !

Good PROPER Marine grade is best. But sadly needs finding. Good WBP is a good compromise if sealed well.
 
If you got really stuck you could take the easy way out and throw some money at it - hard to see how a bit of wood and a couple of brackets can cost over 30 quid.
 
B&Q do 20mm Exterior bonded ply by the quarter sheet. My OB bracket is made, from this, with hardwood stripa glued to the edges.....only Sadolin treated but it's three years old and no sign of any deterioration so far.
 
This is all very helpful. My Hunter 23 is diesel driven but I keep the outboard on a rail on the transom. The idea of buying 2 pieces of 12mm and epoxying really appeals! Spent last season re-epoxying the hull - hopefully this should be a simpler job! /forums/images/graemlins/grin.gif
 
I agree with the suggestions of gluing two, or more, thinner bits togther. Exactly what I did. I used Aerolite 306 glue I think, ceratinly nothing more fancy, it might even have been a water resistant PVA glue. Gave it several coats of varnish and it is still in use about 20 years or more later.

(I even used a bit of ply that I picked up off the scrap wood pile in the boatyard)
 
I wouldn't bother with ply for a small amount like that. Go into a timber merchants and ask them if they have a hardwood offcut. I have picked up a number of offcuts in a variety of hardwoods around around that size for a few pounds each at the local merchants here. Just cut to size, plane and varnish.

Edit

Beaten to it!
 
[ QUOTE ]
Why use ply? would solid timber not do, an offcut of teak or iroko?

[/ QUOTE ]
I'd use ply as it is less likely to split. A solid piece might be ok if the grain runs vertically, but there is still a risk of splits developing because of the fixing holes, which will be more or less in line with the grain. A couple of years exposed to constant wetting and drying won't help either. A piece of solid wood with the grain running horizontally is asking for trouble.
 
Dissagree, I have had a piece of teak for that purpose, doesnt get any wetter than any other external wooden surface, if you are really worried treat it but after 16 years if was going to plit it probably would have already. The way to prevent fixing areas splitting is to drill holes, releives the stress
 
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